William r



(No Model.)

W. R. PATTERSON.

TELEGRAPH CABLE.

Patented Feb. 26, 1889.

UNITED STATES PATENT OFFICE.

\YILLIAM R. PATTERSON, OF CHICAGO, ILLIXOIS, ASSIGXOR TO THE IVESTERX ELECTRIC COMPANY, OF SAME PLACE.

TELEG RAFH =CABLE.

SPECIFICATION forming part of Letters Patent No. 398,441, dated February 26, 1889.

Application filed May 24,1886. Serial No. 203,117. (No modeld To a ZZ whom it may 007200771- My invention is illustrated in ihmu-compao Beitknown that I, \VILLLTM R. PATTERSON, nying drawings, in whicha citizen of the United States, residing at Chi- Figure 1 is a perspective view of a cable cago, in the county of Cook and State of Illiembodying my improvement. Fig. 2 is atrans- 5 nois, have invented a certain new and useful verse sectional view thereof.

Improvement in Telegraph-Cables, (Case 59,) The core (1 consists of a number of wires 5 of which the following is a full, clear, concise, separately insulated by a fibrous material and exact description, reference being had to saturated with paraffine. The impervious the accompanying drawings, forming a part of covering used upon the core is made up, prefro thisspecification. erably, of, first, a winding of yarn, b; next, a

My invention relates to telegraph-cables in winding of drypaper,c,whieh forms a smooth which the core is protected by a lead pipe; bed for the third winding of lead tape, (7. and my invention consists in the combination, Upon thelead tape I wind a layer of dry pawith acore, of animpervious winding thereon, per, 2, and, finally, upon this paper I wind a l 15 and a filling of coal-tar, paint, or similar maserving of strong yarn, f. The filling, g, which terial between the said impervious serving is of some cheap material, like gas-tar, as- M and the lead pipe. The core may consist of phalt, or paint, may be forced in afte the any suitable number of conductors insulated core is drawn into the lead pipe 72; or this fill- J by fibrous material, like jute or cotton, and ing may be introduced with the core as the 20 saturated, preferably, with some insulating pipe is being formed over the whole. In case material, like paraffine. The serving I prefvulcanized tape be used in place of the lead erabiy make of cotton or jute yarn and paper tape the paper windings may be omitted, if and lead tape wound thereon, as hereinafter desired. In case the fabric of the vulcanized described. Any serving that will not be acted tape be of sui'iicientbody and strength it may 25 upon by the paraffine or other insulatingmabe wound as a servin directly upon the core terial and that will be impervious to the filland be left without any outer eoveringorserv- 7 5 ting of coal-tar, paint, or other substance may ing, f.

be used. If the core of conductors be satu- Having thus descrilmdmy inventiomlclaim rated with some compound not aifected by asnewand desire to securebyI.ettersPatcnt o sulphur-for example, a compound of rosin 1. The combination,withacore of insulated and shellac instead of paraffinc-vulcanized i conductors, of an impervious serving wound So tape may be used in place of the lead tape. 1 thereon, the outside lead pipe, and the filling The filling between the serving and the lead of coal-tar, or its equivalent, between the pipe pipe is designed to prevent water from peneand serving, substantially as described. trat-ing longitmtlinally into the pipe in case 2. The combination, with the core (I of septhe pipeshould be ninctured. In the proaratclydnsulated electrical conductors, of a cess of manufacture any flaws that may exist I serving wound thereon and a winding of lead in the pipe may be detected by the filling tape, (1, a serving wound upon the lead tape, oozing out, which is introduced in a liquid 1 the filling g, and the lezul pipe 71, substan- 0 state and usually under pressure. This filltially as described.

.ing may or may not be an insulating subi In witnesswhereof l hereunto subscribe my stance. It should be insoluble in water, and name this 13th day of May, A. l). 18%. of such character that it will not penetrate the serving and impair the insulation of the j 5 conductors. I prefer to use a fillingmaterial that docsnot become hard and brittle, in order that the flexibility of the cable may remain unimpaired. Gas-tar, crude paraffine, r or asphalt I have found suitable materials. 2

\Yll .lllA M R. PATTERSOX.

'\\' itnesses GEORGE P. BARTON, F. H. MCCULLOCH. 

